Abstract

Users go to great lengths to be notified as quickly as possible that
they have received new mail. Most of these methods involve polling
to check for new messages periodically. A push method handled by the
final delivery agent gives users quicker notifications and saves
server resources. This document does not specify the notification
method, but it is expected that using existing instant messaging
infrastructure such as Extensible Messaging and Presence Protocol
(XMPP), or Global System for Mobile Communications (GSM) Short
Message Service (SMS) messages will be popular. This document
describes an extension to the Sieve mail filtering language that
allows users to give specific rules for how and when notifications
should be sent. [STANDARDS-TRACK]